Table 2.

Linearity, LOD, LOQ, repeatability, precision, and stability for four antioxidants in online post-column DPPH assay.

	Linearity			LOD (μg)	LOQ (μg)	Repeatability (n = 6)	Precision (n = 6)	Stability (24 h)
	Test range (μg)	Regression Equation	r	S/N = 3	S/N = 10	RSD (%)	RSD (%)	RSD (%)
Baicalein-7-O-gentiobioside	1.85–18.48	Y = 27803.40X + 10715.58	0.9991	1.16	1.85	1.58	2.27	4.94
Baicalein-7-O-glucoside	1.29–12.90	Y = 54206.71X − 21149.04	0.9990	0.97	1.29	2.29	3.73	2.58
Baicalin	1.24–12.42	Y = 54134.19X − 26188.18	0.9992	0.87	1.24	4.24	0.90	2.17
Baicalein	2.50–7.50	Y = 49422.32X − 39602.40	0.9992	0.06	0.57	4.50	2.17	2.43